JP2015042968A - Impact testing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an impact testing platform capable of removing an influence of an action force and a reaction force during an impact test, and minimizing the displacement quantity of the platform to obtain an accurate impact test result.SOLUTION: An impact testing device 100 includes: a first platform 110; a second platform 120; a plurality of first suspension devices 130; at least one impact assembly; and a plurality of second suspension devices 150. At least one impact assembly is disposed in the second platform 120, and directed toward the first platform 110, and configured to generate at least one impact force to give an impact to the first platform 110. Therefore, it is possible to perform an impact test to an object to be tested in the first platform. The second suspension devices 150 are configured to absorb a reaction force due to the impact force.

Description

  The present invention relates to a test apparatus, and more particularly to an impact test apparatus.

  The impact test equipment is for measuring the reliability of products, and the principle is that the impact test equipment generates a regular or irregular impact force to impact the object under test (ie product). To measure the wrinkles that may be present or appear in the DUT by long-term cumulative impact fatigue, and to evaluate the protective properties of the internal parts, structure or external packaging of the DUT, thereby Use reliability and product quality can be improved.

  In a conventional impact test apparatus, after placing a test object on the platform of the impact test apparatus, an impact test is performed on the platform and the test object by at least one impact assembly provided below the platform. It is intended to measure the wrinkles that may or may appear on the specimen after being bombarded.

  In such a system in which the test object is impacted from the bottom to the top by the at least one impact assembly, related impact test data can be obtained, but the impact force by the at least one impact assembly is simultaneously generated during the impact process. Since it acts on the platform and the device under test, a part of the impact force (and most of the impact force) is absorbed by the platform and consumed by operations not related to the impact test at all.

  On the other hand, according to "Newton's third law of motion", when two objects interact with each other, the force received by one and the other are equal in magnitude and opposite in direction. The “third law of motion” is also referred to as “law of action force / reaction force”. According to this law, when at least one impact assembly performs an impact test from bottom to top, the impact force generated against the platform also produces a reaction force on the at least one impact assembly. Thus, since the platform and the at least one impact assembly both belong to the impact test apparatus and have a spatial relationship related to each other, the at least one impact assembly generates an impact force on the platform and the DUT. At the same time, the reaction force acting on at least one impact assembly according to the “Newton's third law of motion” also indirectly affects the platform and the DUT, thus affecting the final test result. .

  The above case is particularly significant in an embodiment in which at least one impact assembly is a single impact assembly and includes a plurality of impact hammers.

  For example, if the plurality of impact hammers of the single impact assembly are two impact hammers (ie, a first impact hammer and a second impact hammer), the two impact hammers are at an angle of 45 °. The first impact hammer completes the impact if the two impact hammers are sequentially impacted on the platform when the impact is given to the platform so as to incline, and the two impact hammers are provided so as to face each other. Then, and before the second impact hammer gives an impact, the reaction impact force according to the “Newton's third law of motion” acts on the second impact hammer, and the impact force of the second impact hammer on the platform is Affects and causes measurement errors.

  After the first impact hammer completes the impact, when the second impact hammer gives an impact, if the platform cannot be restored to the initial stationary position due to the time difference existing between the impact hammers, the small displacement present at this time In other words, affecting the measurement result is another case where an error may occur.

  As is apparent from the above, a known impact test apparatus can be used to measure wrinkles that may or may appear after the DUT is impacted, but there are relatively many variables that can be used during the test process. Due to the presence of elements or unstable factors, it is difficult to accurately control and obtain accurate results.

  The natural response of the device under test is induced by the stress generated at the moment when the impact hammer is impacting. However, when the device under test is a device or system composed of a plurality of elements, The stress generated at the moment of impacting further induces a natural response of each element. As a result of researches, the inventors have found that the interference phenomenon of the natural response between each of these elements is the largest source that substantially causes damage to each device or system.

  In other words, since a well-known impact test apparatus cannot accurately control the test object, it gives an impact to the test object. Therefore, in order to create an impact response spectrum (SRS) of the test object, each natural element between the elements is naturally It is difficult to measure the interference phenomenon of response, and at the same time, it is difficult to accurately know the reliability and life of the DUT.

  In view of the above, the impact that can effectively remove the influence of the acting force and reaction force during the impact test, minimize the platform displacement, and make the impact test result accurate. How to provide a test platform is an issue that the industry is urgently trying to solve.

  According to the present invention, the at least one impact assembly includes a plurality of first impact hammers and / or second impact hammers, and the plurality of first impact hammers are inclined at a specific angle to the second platform. An object of the present invention is to provide an impact test apparatus which can be provided, the second impact hammer may be perpendicular to the second platform, and provides multi-axial impact force to meet various impact test requirements. To do.

  According to the present invention, a plurality of first suspension devices are used for mounting a first platform provided with a device under test, and a small amount of displacement is applied while the first platform is performing an impact test. It is intended to provide an impact test apparatus capable of generating the impact response spectrum of the DUT by using the impact test data by accurately generating the impact test data obtained by generating only the change. Another purpose.

  The present invention provides at least one impact by effectively absorbing a reaction force generated when at least one impact assembly applies an impact during a process in which the plurality of second suspension devices are performing an impact test. It is still another object of the present invention to provide an impact test apparatus that can reduce the case where the assembly is interfered and can prevent the generated impact from being transmitted to the outside environment.

  To achieve the foregoing object, the present invention provides a first platform, a second platform, a plurality of first suspension devices, at least one impact assembly, and a plurality of second suspension devices. An impact test apparatus is provided. The first platform is for placing a device under test. The second platform is parallel to the first platform and is provided below the first platform. The plurality of first suspension devices are provided to be sandwiched between the first platform and the second platform, and are for mounting the first platform, and include at least one impact assembly. Is disposed on the second platform and is directed toward the first platform and produces at least one impact force to impact the first platform. The plurality of second suspension devices are provided below the second platform with respect to the plurality of first suspension devices. Here, the plurality of second suspension devices mount the first platform, the second platform, the plurality of first suspension devices, and at least one impact assembly, and perform an impact test. However, at least one reaction force due to at least one impact force can be absorbed.

  In order to make the above-described objects, technical features, and merits easier to understand, a detailed description will be given below based on preferred embodiments with reference to the accompanying drawings.

It is a schematic diagram of the impact test apparatus of this invention. It is the schematic diagram in which the 1st platform is not provided of the impact test apparatus of this invention. 1 is a schematic view of a first embodiment of at least one impact assembly of the impact test apparatus of the present invention. FIG. 1 is a schematic view of a first embodiment of at least one impact assembly of the impact test apparatus of the present invention. FIG. FIG. 3 is a schematic view of a second embodiment of at least one impact assembly of the impact test apparatus of the present invention. It is an installation schematic diagram of at least one impact assembly and at least one impacted block of the impact test device of the present invention. It is an installation schematic diagram of at least one impact assembly and at least one impacted block of the impact test device of the present invention. It is a schematic diagram of the block to be impacted of the impact test apparatus of the present invention. It is a schematic diagram of the 1st suspension apparatus of the impact test apparatus of this invention. It is a schematic diagram of the 2nd suspension apparatus of the impact test apparatus of this invention. It is the schematic diagram which provided the impact test apparatus of this invention in the housing | casing.

  As shown in FIG. 1, the impact test apparatus 100 of the present invention can place an object to be tested (not shown) and perform an impact test on the object to be tested. Here, the impact test apparatus 100 includes a first platform 110, a second platform 120, a plurality of first suspension devices 130, at least one impact assembly 140, and a plurality of second suspension devices. 150.

  Hereinafter, only the installation relationship between elements such as the first platform 110, the second platform 120, the plurality of first suspension devices 130, the at least one impact assembly 140, and the plurality of second suspension devices 150 will be described. To do.

  As shown in FIG. 1 and FIG. 2, the first platform 110 is for placing a test object, and the first platform is stably provided by a plurality of fixing holes 112. 110 can be fixed. The second platform 120 is parallel to the first platform 110 and is provided below the first platform 110. The plurality of first suspension devices 130 are provided so as to be sandwiched between the first platform 110 and the second platform 120, and support the first platform 110 from below. At least one impact assembly 140 is disposed on the second platform 120 toward the first platform 110 to generate at least one impact force to impact the first platform 110 after receiving a signal. Is. The plurality of second suspension devices 150 are provided below the second platform 120 with respect to the plurality of first suspension devices 130.

  The plurality of first suspension devices 130 are preferably provided on the peripheral edge 122 of the second platform 120 in order to stably indicate the first platform 110 from below the first platform 110. The four first suspension devices 130 are provided.

  On the other hand, as shown in FIG. 2, in the impact test apparatus 100 of the present invention, each of both sides of the second platform 120 (that is, the upper side 120a facing the first platform 110 and the lower side 120b with respect to the upper side 120a) A plurality of first suspension devices 130 and a plurality of second suspension devices 150 are provided. Accordingly, the plurality of second suspension devices 150 provided on the lower side 120b of the second platform 120 include the first platform 110, the second platform 120, the plurality of first suspension devices 130, and at least one. When an element such as two impact assemblies 140 is placed and an impact test is performed, at least one reaction force generated by at least one impact force generated by at least one impact assembly 140 is effectively absorbed, It is used to avoid that at least one reaction force is transmitted to the outside environment.

  In the embodiment shown in FIGS. 1 and 2, the at least one impact assembly is a plurality of impact assemblies having four impact assemblies 140. Each impact assembly 140 includes at least one first impact hammer 142 and a second impact hammer 144. Preferably, in the embodiment shown in FIG. 3, at least one first impact hammer 142 is provided in the second platform 120 in such a manner that the two are opposed to each other at a specific angle and are provided on the second platform 120. The first impact hammer 142, and the second impact hammer 144 is provided between the four first impact hammers 142.

  More specifically, in the first embodiment of the at least one impact assembly 140 shown in FIGS. 3 and 4, the four first impact hammers 142 are all at a specific angle with respect to the second platform 120. It is provided on the second platform 120 so as to be inclined, and has a mode of facing two by two. Providing to be inclined at this specific angle can be achieved by fixing the first impact hammer 142 to the angle adapter 146, which in this example is 45 °. FIGS. 3 and 4 are both for showing a first embodiment of at least one impact assembly 140, and the difference makes the spatial installation relationship between the first impact hammers 142 more clear. For this reason, the angle adapter 146 is omitted in FIG.

  Accordingly, when the four first impact hammers 142 are provided on the second platform 120 so as to be inclined at an angle of 45 °, the second platform 120 is parallel to the first platform 110, so that the four The first impact hammer 142 also has an impact angle that is inclined at 45 ° with respect to the first platform 110. After receiving the signal, the four first impact hammers 142 generate an impact force in response to a command to operate sequentially or simultaneously based on the contents of the signal so that the first impact hammer 142 tilts at an angle of 45 °. One platform 110 can be impacted.

  Of course, other than the 45 ° tilt angle described above, the four first impact hammers 142 may tilt at other angles with respect to the second platform 120, depending on different test requirements. That is, the inclination angle is not limited to that shown here.

  In the second embodiment of the at least one impact assembly 140 shown in FIG. 5, the impact assembly 140 may further comprise a second impact hammer 144, which is perpendicular to the second platform 120. Is provided on the second platform 120 and between the four first impact hammers 142, and is surrounded by the four first impact hammers 142.

  When the second impact hammer 144 is provided, a signal is supplied to the second impact hammer 144 to operate it when applying an impact force perpendicular to the DUT provided on the first platform 110. Can generate an impact force and directly apply a perpendicular impact to the first platform 110, and can add a signal as in the first embodiment of the at least one impact assembly 140 shown in FIGS. Thus, it is not necessary to apply impact to the first platform 110 so that the four first impact hammers 142 are simultaneously operated and the resultant force is in the vertical direction. In other words, when it is necessary to always perform a vertical impact test, the installation of the second impact hammer 144 is advantageous to achieve the purpose of saving power.

  In addition to the first and second embodiments of the at least one impact assembly 140, those skilled in the art will recognize the quantity and orientation of the first impact hammer 142 and / or the second impact hammer 144 as needed. May be combined with an impact composite force having an arbitrary direction and force to provide multi-axial impact force to the device under test to satisfy various different impact test requirements.

  On the other hand, the first impact hammer 142 and / or the second impact hammer in both the first and second embodiments of the at least one impact assembly 140 shown in FIGS. Since 144 acts to directly impact the first platform 110, in the process of impacting the first platform 110 such that the first impact hammer 142 tilts at a specific angle, Since the direction of the impact force generated by the first impact hammer 142 is not perpendicular to the first platform 110, the impact force may be distributed and attenuated more or less, which adversely affects the impact test results. .

  In order to avoid the case where the impact force is distributed and attenuated, as shown in FIGS. 6 and 7, the first platform 110 may further include at least one impacted block 114. At least one impact block 114 is provided below the first platform 110, and each has a surface 114 a orthogonal to each first impact hammer 142 and / or second impact hammer 144, and each first When the first impact hammer 142 and / or the second impact hammer 144 are operated, the direction of the generated impact force is transmitted to the first platform 110 perpendicular to the impacted block 114 so that there is no loss. 110 can be impacted.

  In an embodiment of the present invention, the number of impact blocks 114 corresponds to the number of impact assemblies 140, and as shown in FIG. 8, the shape of the impact blocks 114 is a polyhedron having a plurality of impact surfaces 114a, for example, A bevel block is preferred. Of course, without being limited to this, the shape of the impacted block 114 may be a hemisphere, a cube, or the like, and each of the impacted blocks 114 may be the first impact hammer 142 and / or the second impact hammer. It is only necessary to satisfy the condition that the surface 114a is orthogonal to 144.

  In the embodiment shown in FIGS. 1 and 2, in terms of economy, other than the aspect where at least one impact assembly is four impact assemblies 140, at least one impact assembly is a single impact assembly 140. Similarly, four first impact hammers 142 inclined at a specific angle and a second impact hammer 144 provided vertically may be provided.

  Since the installation relationship between the single impact assembly 140 and the first platform 110 and the second platform 120 is similar to the installation relationship of the embodiments of the plurality of impact assemblies 140, the installation relationship between the elements is represented here. I will not elaborate. Similarly, the quantity and tilt angle of the first impact hammer 142 and the second impact hammer 144 may be adjusted according to different test requirements.

  In the present invention, in order to satisfy the requirement of obtaining accurate impact test data, a well-known air hammer cannot be used as the first impact hammer 142 and the second impact hammer 144. In order to control the intensity and frequency, it is necessary to use an electromagnetic hammer operated by electrical signals.

  In addition to fixing the DUT by the plurality of fixing holes 112 on the first platform 110, the DUT is adsorbed by using a plurality of vacuum suction holes instead of the plurality of fixing holes 112, and fixed in the same manner. You may make it achieve an effect. The first platform 110 is disposed below the first platform 110, and rotates the first platform 110 horizontally with respect to the second platform 120 so that the test personnel can easily observe during the impact test. Further, a rotation mechanism 116 used for the above may be provided.

  On the other hand, as shown in FIG. 9, the plurality of first suspension devices 130 include a top portion 132, a bottom portion 134 with respect to the top portion 132, and a plurality of coils 136 between the top portion 132 and the bottom portion 134. Referring now to FIG. 1 together, the top 132 and the bottom 134 may be secured to the first platform 110 and the second platform 120, respectively, and the plurality of coils 136 may be coupled to the first platform 110 and the first platform 110, respectively. It may be used to support a DUT provided on the top.

  Accordingly, as shown in FIG. 9, the plurality of coils 136 of the first suspension device 130 are made of steel pipes or steel cords and have extremely high vibration resistance, so that the top 132, the bottom 134, and the plurality of coils 136 are separated from each other. The first suspension device 130 has a special spherical structure, and when the first suspension device 130 is used to place the first platform 110 provided with a device under test, an impact test is performed. In the process of performing the test, the first platform 110 generates only a small amount of displacement change to increase the accuracy of the obtained impact test data, and the impact response spectrum of the DUT is used by using the impact test data. Is created.

  As shown in FIG. 10, the plurality of second suspension devices 150 effectively absorb the reaction force generated when at least one impact assembly 140 applies an impact during the impact test. Reducing the case of at least one impact assembly 140 being interfered when operating, and increasing the accuracy of the resulting impact test data. To that end, it needs to be used to support the first platform 110, the second platform 120, the plurality of first suspension devices 130 and the at least one impact assembly 140, preferably silica gel, rubber, Silica gel base made of plastic, foam or other material with vibration absorption effect, avoiding the generated shock to be transmitted to the external environment.

  As shown in FIG. 11, the impact test apparatus 100 of the present invention has a first platform 110, a second platform 120, in order to enhance the isolation effect from the external environment and increase mobility when carried. A housing 160 may be further included for housing the plurality of first suspension devices 130, at least one impact assembly 140 and the plurality of second suspension devices 150.

  In the embodiment shown in FIGS. 1 and 2, the first platform 110 is a circular platform and the second platform 120 is a generally rectangular platform. However, the shapes of the first platform 110 and the second platform 120 are not limited thereto, and those skilled in the art may easily change the shapes of the first platform 110 and the second platform 120. .

  As described above, the at least one impact assembly 140 included in the impact test apparatus 100 of the present invention includes at least the first impact hammer 142 and / or the second impact hammer 144, and at least the first impact hammer 142 is provided. Since the second impact hammer 144 may be inclined at a specific angle with respect to the second platform 120 and the second impact hammer 144 is perpendicular to the second platform 120, at least one first impact hammer 142 and a second impact By combining the hammer 144, it is possible to provide a multi-axial impact force to the device under test and meet various impact test requirements.

  On the other hand, a plurality of first suspension devices 130 can be provided, and the plurality of first suspension devices 130 are used to support the first platform 110 on which the DUT is provided. In the process of performing the impact test, the platform 110 of the robot 110 is controlled so as to generate only a small amount of displacement change, and the accuracy of the obtained impact test data is increased. Is created.

  A plurality of second suspension devices 150 may be provided, and the plurality of second suspension devices 150 are generated when at least one impact assembly 140 applies an impact during an impact test. By effectively absorbing the reaction force, it is possible to reduce the case where the at least one impact assembly 140 is interfered with the reaction force and to prevent the generated impact from being transmitted to the external environment.

  As described above, the plurality of ultra-compact and high-efficiency impact assemblies 140 included in the impact test apparatus 100 of the present invention simultaneously generate accurate operating force without time difference and accurately impact the test object on the first platform 110. And the impact response spectrum of the DUT is measured. In addition, understand the source of the damage when the DUT is impacted, and improve the reliability of the DUT and extend its service life according to the result of its shock response spectrum. Can do.

  The above-described examples are merely illustrative of the embodiments of the present invention and merely illustrate the technical features of the present invention, and are not intended to limit the technical scope of the present invention. All modifications or equivalent arrangements that can be easily completed by those skilled in the art are included in the technical scope of the present invention. The technical scope of the present invention should be based on the claims.

100 impact test apparatus 110 first platform 112 fixing hole 114 impacted block 114a surface 116 rotating mechanism 120 second platform 120a upper side 120b lower side 122 peripheral edge 130 first suspension unit 132 top part 134 bottom part 136 coil 140 impact assembly 142 First impact hammer 144 Second impact hammer 146 Angle adapter 150 Second suspension device 160 Housing

Claims (19)

An impact test apparatus capable of performing an impact test on the test object after placing the test object,
A first platform for placing the device under test;
A second platform parallel to the first platform and provided below the first platform;
A plurality of first suspension devices provided to be sandwiched between the first platform and the second platform, and for placing the first platform;
At least one impact assembly disposed on the second platform and directed to the first platform to generate at least one impact force to impact the first platform;
A plurality of second suspension devices provided below the second platform with respect to the first suspension device;
With
The second suspension device is configured to perform the impact test by placing the first platform, the second platform, the first suspension device, and the at least one impact assembly. An impact test apparatus capable of absorbing at least one reaction force due to the at least one impact force.   The impact test apparatus of claim 1, wherein the at least one impact assembly comprises an impact assembly that includes at least one first impact hammer.   The impact test apparatus according to claim 2, wherein the at least one first impact hammer is four first impact hammers provided to face each other.   The impact test apparatus according to claim 3, wherein the impact assembly further includes a second impact hammer provided between the four first impact hammers.   The impact of claim 1, wherein the at least one impact assembly comprises a plurality of impact assemblies, the impact assembly is four impact assemblies, and each impact assembly comprises at least one first impact hammer. Test equipment.   The impact test apparatus according to claim 5, wherein the at least one first impact hammer is four first impact hammers provided to face each other.   The impact test apparatus of claim 6, wherein each impact assembly further comprises a second impact hammer provided between the four first impact hammers.   The impact test apparatus according to claim 3 or 6, wherein the four first impact hammers are provided on the second platform and are inclined at a specific angle with respect to the second platform.   The impact test apparatus according to claim 4 or 7, wherein the second impact hammer is provided perpendicular to the second platform.   The first platform comprises a plurality of fixing holes and at least one impacted block provided below the first platform and capable of being impacted by the at least one impact assembly. The impact test apparatus described.   The impact test apparatus according to claim 10, wherein the at least one impacted block is a hemisphere, a polyhedron, or a cube.   The impact test apparatus according to claim 1, wherein the first suspension device is provided on a peripheral edge of the second platform.   2. The impact test apparatus according to claim 1, wherein the first platform has a rectangular shape or a circular shape, and further includes a rotation mechanism that drives the first platform to rotate horizontally with respect to the second platform. 3. .   The impact test apparatus according to claim 1, wherein the second platform is rectangular or circular.   The first suspension device includes a top, a bottom relative to the top, and a plurality of coils abutted between the top and the bottom, wherein the top and the bottom are respectively the first platform and the The impact test apparatus of claim 1, wherein the impact test apparatus may be fixed to a second platform, and the coil may be used to mount the first platform.   The impact test apparatus according to claim 15, wherein the coil of the first suspension device is formed of a steel pipe or a steel cable.   The impact test apparatus of claim 1, wherein the second suspension device is silica gel based.   The impact test device according to claim 17, wherein the second suspension device is made of a material such as silica gel, rubber, plastic or foam. The housing of claim 1, further comprising a housing for housing the first platform, the second platform, the first suspension device, the at least one impact assembly, and the second suspension device. Impact test equipment.

Images